Iphampu ye-pneumatic diaphragm enomklamo olula nesakhiwo, isebenzisa i-valve yomoya eqondayo ngaphandle kokuthambekele okuwuketshezi. Kulula ukulondolozela nokuphila kwenkonzo ende. Zonke izingxenye ezingathinti okuphakathi zenziwa ngento ebonakalayo ye-PP, evikela ngokuqinile ingxenye eyinhloko ye-valve, uphawu olungcono, akukho phuzu lokuvuza, nokuphikiswa okunamandla kokuqina.